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We use a disk galaxy evolution model to investigate the impact of mass outflows (a.k.a. feedback) on disk galaxy scaling relations. Our model follows the accretion, cooling, star formation and ejection of baryonic mass inside growing dark…

天体物理学 · 物理学 2009-06-09 Aaron A. Dutton , Frank C. van den Bosch

In recent years, several analytic models have demonstrated that simple assumptions about halo growth and feedback-regulated star formation can match the (limited) existing observational data on galaxies at z>6. By extending such models, we…

星系天体物理 · 物理学 2022-02-16 Steven R. Furlanetto , Jordan Mirocha

We analyse a set of galaxy interactions performed by using a self-consistent chemo-hydrodynamical model which includes star formation, Supernova feedback and chemical evolution. In agreement with previous works, we find that tidally-induced…

宇宙学与河外天体物理 · 物理学 2015-05-28 Josefa Perez , Leo Michel-Dansac , Patricia Tissera

We compare the properties of galaxies that form in a cosmological simulation without strong feedback to observations at z=0. We confirm previous findings that models without strong feedback overproduce the observed galaxy baryonic mass…

宇宙学与河外天体物理 · 物理学 2015-05-13 Dušan Kereš , Neal Katz , Romeel Dave , Mark Fardal , David H. Weinberg

We show that the mass fraction of GMC gas (n>100 cm^-3) in dense (n>>10^4 cm^-3) star-forming clumps, observable in dense molecular tracers (L_HCN/L_CO(1-0)), is a sensitive probe of the strength and mechanism(s) of stellar feedback. Using…

星系天体物理 · 物理学 2014-11-13 Philip F. Hopkins , Desika Narayanan , Norman Murray , Eliot Quataert

The formation and evolution of galaxies have proved sensitive to the inclusion of stellar feedback, which is therefore crucial to any successful galaxy model. We present INFERNO, a new model for hydrodynamic simulations of galaxies, which…

星系天体物理 · 物理学 2023-03-15 Eric P. Andersson , Oscar Agertz , Florent Renaud , Romain Teyssier

We compute different sets of stellar evolutionary tracks in order to quantify the energy, mass, and metals yielded by massive main-sequence and post-main-sequence winds. Our aim is to investigate the impact of binary systems and of a…

星系天体物理 · 物理学 2022-04-26 Yvonne A. Fichtner , Luca Grassitelli , Emilio Romano-Díaz , Cristiano Porciani

Nearby dwarf galaxies exhibit tight correlations between their global stellar and dynamical properties, such as circular velocity, mass-to-light ratio, stellar mass, surface brightness, and metallicity. Such correlations have often been…

天体物理学 · 物理学 2010-11-11 Konstantinos Tassis , Andrey V. Kravtsov , Nickolay Y. Gnedin

High-redshift star-forming galaxies often have irregular morphologies with {\it giant clumps} containing up to $10^{8-9}$ solar masses of gas and stars. The origin and evolution of giant clumps are debated both theoretically and…

星系天体物理 · 物理学 2021-06-30 Jérémy Fensch , Frédéric Bournaud

The physics of star formation and the deposition of mass, momentum, and energy into the interstellar medium by massive stars (`feedback') are the main uncertainties in modern cosmological simulations of galaxy formation and evolution. These…

Although supernova explosions and stellar winds happens at scales bellow 100 pc, they affect the interstellar medium(ISM) and galaxy formation. We use cosmological N-body+Hydrodynamics simulations of galaxy formation, as well as simulations…

天体物理学 · 物理学 2009-11-13 Daniel Ceverino , Anatoly Klypin

Magnetic stresses collimate protostellar winds into a common distribution of force with angle. Sweeping into the ambient medium, such winds drive bipolar molecular outflows whose properties are insensitive to the distribution of ambient gas…

天体物理学 · 物理学 2007-05-23 Christopher D. Matzner

Protostellar feedback, both radiation and bipolar outflows, dramatically affects the fragmentation and mass accretion from star-forming cores. We use ORION, an adaptive mesh refinement gravito-radiation-hydrodynamics code, to simulate the…

太阳与恒星天体物理 · 物理学 2015-06-03 Charles E. Hansen , Richard I. Klein , Christopher F. McKee , Robert T. Fisher

The question of what regulates star formation is a long standing issue. To investigate this issue, we run simulations of a kiloparsec cube section of a galaxy with three kinds of stellar feedback: the formation of HII regions, the explosion…

星系天体物理 · 物理学 2020-06-22 Noé Brucy , Patrick Hennebelle , Frédéric Bournaud , Cédric Colling

We examine the combined effects of winds and photoionizing radiation from O--type stars on embedded stellar clusters formed in model turbulent molecular clouds covering a range of masses and radii. We find that feedback is able to increase…

星系天体物理 · 物理学 2015-08-06 J. E. Dale , B. Ercolano , I. A. Bonnell

We present new constraints on the density profiles of dark matter (DM) halos in seven nearby dwarf galaxies from measurements of their integrated stellar light and gas kinematics. The gas kinematics of low mass galaxies frequently suggest…

(Abridged) The star-formation rate (SFR) quantitatively describes the star-formation process in galaxies. Current ways to calibrate this rate do not usually employ observational methods accounting for the low-mass end of stellar populations…

星系天体物理 · 物理学 2023-06-07 K. M. Dutkowska , L. E. Kristensen

Star formation from the interstellar medium of galactic disks is a basic process controlling the evolution of galaxies. Understanding the star formation rate in a local patch of a disk with a given gas mass is thus an important challenge…

星系天体物理 · 物理学 2017-06-14 Michael J. Butler , Jonathan C. Tan , Romain Teyssier , Joakim Rosdahl , Sven Van Loo , Sarah Nickerson

We present 2D hydrodynamical simulations for the evolution of early-type galaxies containing central massive black holes (MBHs), starting at age 2 Gyr. The code contains accurate and physically consistent radiative and mechanical AGN wind…

星系天体物理 · 物理学 2017-01-25 L. Ciotti , S. Pellegrini , A. Negri , J. P. Ostriker

We present a comparison of the observed evolving galaxy stellar mass functions with the predictions of eight semi-analytic models and one halo occupation distribution model. While most models are able to fit the data at low redshift, some…